Ice-making machine.



PATENTBD JULY 28, 1903.

H. G. RANDALL.

ICE MAKING MACHINE.

APPLICATION FILED JAN. 20. 1903.

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No. 734,748. I PATENTED JULY 28, 19031. H. G. RANDALL.

10E MAKING MACHINE.

APPLICATION FILED JAN. 20, 1903.

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Patented J'uly 28, 1903.

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.PATENT IIENRY GASTON RANDALL, OF` BRIDGEPORT, CONNECTICUT, ASSIGN OR TOWILLIAM A. SWEETSER AND HENRY S. ELLIOTT, OF NEW YORK, N. Y.

lcs-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 734,748, dated July 28,1903. Application filed January 20, 1903. Serial No. 139,796. (Nomodel.)

To @ZZ whom it -may concern.-

Be it known that I, HENRY GASTON RAN- y DALL, a resident of Bridgeport,Connecticut,

have invented a new and useful Improvement in IcefMaking Machines, whichinvention is fully setforth in the following specification. My inventionrelates to hand-operated icemachines, and more particularly to thatclass of ice-machines which employa vacuum in connection with ahygroscopic substance to produce the refrigerative temperature, and hasfor its object to'provide a machine of the class named which shall be sosimple in its construction as to be cheaply manufactured and easy tokeep in repair, while at the same time it shall be eective in itsoperation and pro- 1 duce ice at a minimum cost.

With this object in view the invention consists of a chamber forcontaining the water or other vliquid to be frozen, (which chamber ishereinafter designated the ice-chamber,) a second chamber inclosing theicechamber and containing the'.hygroscopic material and which is closedair-tight when in operation,

a vacuum-pump in communication with said second ,chamber for producing avacuum therein, and connections between the pump and hygroscopicvacuum-chamber, whereby Fig. 4 is a detail.

Referring to the drawings, 1 is aframework, `preferably made of lightangle-iron and having bearings 3 3 for the trunnions 4 and 5 of abasket6, preferably also of iron. Supported in the basket 6 is a vessel 7,made of material, as glass, capable of resisting the action ofchemicals, provided with a top 8, which may be closed air-tight byscrew-clamps 9 and 10, suitable packing being employed, if necessary, tomake the joint air-tight. Within the vessel 7 is a second vessel l1, ofmaterial not affected by chemicals, as glass or porcelain, which vesselhas an outwardly-extending flangel2, which fits snugly within the ves-16, provided with trunnions 17 17v near its base, which trunnions restin bearings 18 18 on the frame 1. The piston-rod 19 to said pump isconnected to a crank 20. on a shaft 21, having bearings in the frame 1and operated by a hand-wheel 22.

The bottom of the basket 6 is connected to the bottom of the pump 16 bya link 23, engaging wrist-pins on the pump and basket, respectively,anda flexible pipe 24 leads from the suction end of the pump to thevessel 7.

The operation of the machine is as follows Water or other liquid to befrozen being placed in the vessel 14 and chlorid of calcium or othersuitable hygroscopic material in the vessel 7, the lid or cover 8 isclosed air-tight andthe hand-wheel 22 turned to operate the air-pump toproduce the required vacuum in .the vessels 7, 11, and 14. As thehandpump is operated by the crank 2O the pump is caused to rock on itstrunnions, and by reason of the link connection 23 this causes thebasket 6 and the vessel 7 to also rock on trunnions 4 and 5, therebyagitating the hygroscopic -material 25. This 4agitation of thehygroscopic material causes new surfaces thereof to be presented toabsorb the moisture orv vapor resulting from the rapid evaporation ofthe liquid in vessel 14. The vacuum maintained by the pump and theabsorption of the vapor by the hygroscopic material causes such rapidevaporation of the liquid in the vessel as to speedily lower thektemperature thereof to the freezing-point.

It will be observed that the construction and operation of the machineis extremely simple, requiring cheap materials and the minimum amount ofpower to operate it.

Having thus described the invention', I claim- 1. In an ice-makingmachine, the combination of a vacuum-chamber, having a hygroscopic'material therein, an ice-chamber contained in said vacuum-chamber, avacuum-pulnp connected to said Vacuum and ice chambers, and meanssimultaneously rocking the Vacuum-chamber and actuating the pump.

2. In an ice-machine, the combination of a vacuum-chamber hung ontrunnions and containing a hygroscopic material, an ice-chamber therein,a vacuum-pump also mounted on trunnions, a conduit leading from saidvacuum-chamber to said pump, means for simultaneously operating saidpump and rocking it on its trunnions, and connections be' tween saidpump and vacuum chamber, whereby the rocking of the pump rocks the saidchamber on its trunnions.

3. In an ice-making machine, the combination of a vacuum-chambercontaining a hygroscopic material and an ice-chamber, and meanssimultaneously agitating said vacuum chamber and producing a Vacuumtherein.

4:. In an ice-making machine, the combination of a rockingvacuum-chamber contain- 6. In an ice-making machine, the combination ofa frame, a basket hung on trunnions in said frame, a vacuum-chambersupported by said basket, hygroscopic material and an ice-chamber insaid Vacuum-chamber, a rocking vacuum-pump also supported on said frame,a ieXible pipe connecting the pump and vacuum-chamber, a link connectingthe pump and basket, and means simultaneously rocking and operating thepump.-

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

HENRY GASTON RANDALI'..

Witnesses:

WM. A. SWEETSER, M. MAYLAND.

